微信多媒体下载接口的使用示例

$mediaId = 'xxxxxxxxxx';
$accessToken = getAccessToken($_C['appId'],$_C['appSecret']);
$downloadApi = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token={$accessToken}&media_id={$mediaId}";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $downloadApi);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($ch);
curl_close($ch);

$fileName = 'filename.jpg';
@chmod($fileName,777);
$handle = fopen($fileName,'wb');
fwrite($handle, $output);
fclose($handle);